#ifndef DIGIT_PROPERTY_H
#define DIGIT_PROPERTY_H
#include <stdbool.h>

/*
 * priority of operators
 * NOTE: smaller value means higher priority
 * */
extern const char *priority[];

extern char *braces;

int find_index(const char *string, char letter);
bool is_opend(char c);
/*
 * NOTE: smaller value means higher priority
 */
int get_priority(char c);

int is_calc(char c);
#endif